Oiling, Accusump placement ? Options

[KevinP]

How many of you guys out there are using "Accusump" pre oilers and where are you mounting them? Engine compartment heat has me concerned.... everyone using an external oil cooler with this type set-up?

I'm open for ideas--- (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

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KP

[Thorshammer]

An Accusump (Brand name) is an accumulator.

I have run them with success on 914 engines in the past with excellent results, Just need to make a checklist to shut the car off so that you trap the oil into the accumulator ( no free advertising here).

Basically bringing the revs up and trapping 50-80 psi of oil into your accumulator. This is how it works. Then on restart, prime the fuel pump, turn on the ignition and open the accumulator valve and turn the key to start (or press the button in my case) I do not run one on my six, because it develops oil pressure very quickly, and the engine is dry sumped and carries alot of oil so it does not starve itself under cornering loads. This reduction of oil pressure at conering loads is what kills many race engines. The accucump will have whatever PSI the engine is at, in it while the valve is open. So if a sudden drop in pressure occurs (like from a momentary or sustained G load) the contents from the accumulator are delivered to the engine under pressure until the accumulator capacity is depleated.

Only one small caveat, if you forget to shut the valve off prior to shutting the engine down, close the valve for restart, because the oil pump will be filling the accumulator the same time it is trying to lubricate the engine bearings,.... not good. After the engine is started open the valve slowly at any RPM above tick over, and watch the main oil pressure gauge so it does not drop too low. If it starts to drop low, close the valve and increase the RPM and open the valve SLOWLY again until the oil pressure is stabile. This ends accumulator 101 provided by EM. Good Luck, I would always run one on a 914-4 motor even if I had a dry sump pump, but thats my 2 cents. Jake may have a better solution.


Erik Madsen "Runoffs Bound"

PS: "Tune in next week for an encouraging discussion about the female galapogos turtle and her odd mating rituals" Until then, I'm EM signing off.